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公开(公告)号：US10461935B2
公开(公告)日：2019-10-29
申请号：US15582358
申请日：2017-04-28
IPC分类号： G06F7/02 , G06F19/00 , G06F21/32 , G06F21/34 , G06F21/83 , G06K9/00 , H04L9/32 , H04L29/06 , G06Q20/40
摘要： The invention proposes a method for processing biometric data, comprising verification of the result of a calculation of distance between a biometric candidate datum and at least one biometric reference datum, each comprising a number n of indexed components (ai, bi), said calculation of distance comprising that of a polynomial of the components of the biometric data,the method being executed by a proving entity and a verification entity, the method comprising steps during which: the proving entity communicates to the verification entity the result of calculation of the distance between the candidate and reference biometric data, and said data, the proving entity generates from each datum a function of a number d of variables fa(i1, . . . , id), fb(i1, . . . , id) where d=log2 n, defined for each variable on the set {0,1}, by reformulation of the index i of each component (ai, bi) in binary format, the proving entity generates from each function a polynomial of d variables ã(x1, . . . xd), {circumflex over (b)} (x1, . . . xd) defined on d where is a finite field, such that each polynomial ã, {circumflex over (b)} coincides with the corresponding function fa,fb on the set {0,1}d, and generates from the polynomials ã, {circumflex over (b)} a polynomial p(x1, . . . , xd) of d variables of the same expression as that of the distance between the data, and the proving entity and the verification entity engage in a Sumcheck protocol applied to the polynomial p to verify the result of calculation of the distance between the data.
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公开(公告)号：US10346682B2
公开(公告)日：2019-07-09
申请号：US15637822
申请日：2017-06-29
发明人： Olivier Touret , Pierre Chastel
摘要： A method for authenticating at least one document having a predetermined format and carrying at least one security pattern of appearance that varies as a function of an angle of observation, the method comprising the steps of: capturing at least one image of the document; determining a camera angle by comparing geometric characteristics detected in the document and stored predetermined geometric characteristics; deducing an expected appearance for the security pattern; comparing the expected appearance with an appearance detected in the image of the document; and declaring the document authentic when the expected appearance matches the detected appearance.
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公开(公告)号：US10216973B2
公开(公告)日：2019-02-26
申请号：US15451246
申请日：2017-03-06
摘要： The invention relates to a method for processing an image comprising a set of pixels, each pixel being associated with a grey level, the method comprising a step of segmentation of the image to generate a modified image only containing regions of the image having an alternation of bright zones and dark zones at a frequency greater than a minimum frequency, said step of segmentation comprising: the allocation, to each pixel of the image, of a frequency response level, corresponding to a frequency of alternations of bright zones and dark zones in the vicinity of the pixel, the definition of regions of the image by grouping together neighboring pixels of same frequency response level, the determination of a threshold frequency response level, and the generation of an image only comprising regions of which the pixels have a frequency response level greater than or equal to the threshold frequency response level.
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公开(公告)号：US10068125B2
公开(公告)日：2018-09-04
申请号：US15315511
申请日：2015-06-02
IPC分类号： G06K9/00
摘要： The invention relates to a device and to a method for validating whether an object is an element (5) of the human body, comprising at least the following steps: illuminating with at least one first light source (1) and with at least one second light source (2) an object that it is desired to validate is or is not a human body element; acquiring an image with an image sensor (3), the pixels of said image being associated with at least two characteristic values of a first color component and of a second color component, respectively; implementing validating processing dependant on comparisons between the values of the second component of the pixels in a zone of interest of the image and values of the first component of said pixels; validating or not the authenticity of the object (5) depending on the result of the validating processing.
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公开(公告)号：US10037638B2
公开(公告)日：2018-07-31
申请号：US15602737
申请日：2017-05-23
发明人： Olivier Touret , Pierre Chastel
CPC分类号： G07C9/00087 , G06F21/32 , H04L9/3231
摘要： The invention proposes a method for controls on persons in possession of a document comprising a machine-readable zone containing a document number and an electronic chip in which an authentication biometric is stored, comprising: at a first step (100), acquiring (120) a biometric datum, acquiring (110) the document number by reading the machine-readable zone, and recording (130), in a memory (20), the number linked with the biometric datum, and at a second step (200), acquiring (210) a biometric, from said biometric datum retrieving (220), in the memory, the number of the identity document corresponding to the person, accessing the content of the chip and retrieving the authentication biometric datum (240), and performing authentication (250) of the person by comparing the authentication biometric datum with a biometric datum of the person.
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公开(公告)号：US20180091297A1
公开(公告)日：2018-03-29
申请号：US15716372
申请日：2017-09-26
CPC分类号： H04L9/0631 , H04L9/002 , H04L9/14
摘要： The present invention relates to a method for symmetrical encryption or decryption of a data block from a secret key (K), the method comprising steps of: permutation (100) of at least one portion of the secret key (K) by means of a first permutation table (PC1′) so as to produce initial data, execution of several iterations, an iteration comprising steps of: rotation (102) of data dependent on the initial data so as to produce shifted data, permutation (104) of the shifted data by means of a second permutation table (PC2′) so as to produce a round key, execution of a plurality of encryption rounds (200) from the data block, an encryption round (200) using one of the round keys, generation of at least one of the permutation tables (PC1′, PC2′), the generation comprising determination of at least one function (F, G) variable from one encryption or decryption to another, composition of said function (F, G) with a predetermined permutation table (PC1, PC2), application of the inverse of said function (F, G) to data dependent on the data produced by the permutation step (100, 104) using the generated permutation table (PC1′, PC2′).
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公开(公告)号：US20180005027A1
公开(公告)日：2018-01-04
申请号：US15637822
申请日：2017-06-29
发明人： Olivier TOURET , Pierre CHASTEL
IPC分类号： G06K9/00
CPC分类号： G06K9/00442 , G06K9/2063 , G06K9/228
摘要： A method for authenticating at least one document having a predetermined format and carrying at least one security pattern of appearance that varies as a function of an angle of observation, the method comprising the steps of: capturing at least one image of the document; determining a camera angle by comparing geometric characteristics detected in the document and stored predetermined geometric characteristics; deducing an expected appearance for the security pattern; comparing the expected appearance with an appearance detected in the image of the document; and declaring the document authentic when the expected appearance matches the detected appearance.
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公开(公告)号：US20170236126A1
公开(公告)日：2017-08-17
申请号：US15432273
申请日：2017-02-14
CPC分类号： G06Q20/40145 , G06F21/32 , G06Q20/1085 , G06Q20/34 , G06Q20/4012 , G06Q40/02 , G07F7/1008 , G07F19/00
摘要： A method for parameterising a device for performing banking operations in which biometric data of the holder of the device for performing banking operations are used to authenticate the user of the device. The present invention: activates a plurality of commands using identifiers of a standard relating to banking transactions available for effecting commands not predefined by the standard; creates, from an identifier of the standard relating to banking transactions available for effecting commands not predefined by the standard, in the device for performing banking operations, a container able to store reference biometric data of a user of the device for performing banking operations; and stores reference biometric data, using an identifier of the standard relating to banking transactions available for effecting commands not predefined by the standard, in the container of reference biometric data of the user of the device for performing banking operations.
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公开(公告)号：US20170222798A1
公开(公告)日：2017-08-03
申请号：US15418352
申请日：2017-01-27
发明人： Constance MOREL , Julien BRINGER , Herve CHABANNE
CPC分类号： H04L9/0643 , G06F21/72 , H04L9/14 , H04L9/30 , H04L9/3231 , H04L9/3236 , H04L2209/46 , H04L2209/50
摘要： The invention proposes a method comprising the evaluation of a function F obtained by applying to n sub-functions fi a first operation, the evaluation comprising: the application of a series of calculation steps in which a first unit assumes a role of a client and a second unit assumes a role of a server, and the repetition of the series of calculation steps in which the roles of client and of server are exchanged between the units, each series of steps comprising: a) randomly generating, by the server, first data, and a second datum, b) for each sub-function fi, generating by the server a set of elements formed by: a result of fi evaluated in the data of the client and of the server, masked by a first datum, by applying the first operation between the result and the first datum, and masked by the second datum, by applying between the masked result and the second datum of a second operation different from the first and distributed relatively to the latter, c) recovering by oblivious transfer, by the client, an intermediate datum corresponding to one of the elements generated by the server, d) generating, by the server, a first result portion, by: masking each first datum with the second datum, applying to all the first masked data of the first operation, and e) generating by the client, a second result portion, by applying all the intermediate data of the first operation.
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公开(公告)号：US20170142103A1
公开(公告)日：2017-05-18
申请号：US15353633
申请日：2016-11-16
发明人： Julien BRINGER , Roch Olivier LESCUYER DE CHAPTAL-LAMURE , Herve CHABANNE , Eduardo SORIA-VAZQUEZ
CPC分类号： H04L63/0861 , G06F17/10 , G06F21/32 , H04L9/0869 , H04L9/3218 , H04L9/3231 , H04L63/0442 , H04L63/061 , H04L2209/46 , H04L2209/76
摘要： The present invention relates to a biometric identification method of an entity comprising computation of a matching value between biometric data of an entity u and reference biometric data u′, by application of a function F to said biometric data by performing a non-interactive, publicly verifiable computation method comprising: representation of said function in the form of an arithmetic circuit converted into a polynomial representation, and generation of keys, determination of matching value by evaluating the arithmetic circuit having the biometric data of the entity and the reference biometric data as inputs, generation of proof of correction of the computation execution of the matching values, verification of said received proof, representation of said function comprising encoding of an integer k>1 of binary integers of a vector of a biometric datum on at least one input wire of the circuit, and the function F comprising at least m scalar products, if the divider m is equal to 2 or 3, evaluation of the circuit iteratively comprises computation of each of the m scalar products by means of N/km multiplication operators, storage and summation of m results of computations of said scalar products and if the divider m is greater than or equal to 4, evaluation of the circuit iteratively comprises computation of each of the m scalar products by alternatively using a first or a second sub-circuit to compute the sum of the scalar product of the values of the input wires of this sub-circuit and of a value stored in a storage memory of the other sub-circuit.
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